diff --git a/typo3/sysext/install/Resources/Private/Templates/Installer/ShowEnvironmentAndFolders.html b/typo3/sysext/install/Resources/Private/Templates/Installer/ShowEnvironmentAndFolders.html
index 4028d20560ec456b837665dba32f1cac58a9f713..bc1533ae3c0be5ae60c0e8de3b8d6c6c1e48a80a 100644
--- a/typo3/sysext/install/Resources/Private/Templates/Installer/ShowEnvironmentAndFolders.html
+++ b/typo3/sysext/install/Resources/Private/Templates/Installer/ShowEnvironmentAndFolders.html
@@ -24,7 +24,7 @@
 	</div>
 </form>
 <form class="t3js-installer-environmentFolders-good" style="display: none;">
-	<button class="btn success t3js-installer-environmentFolders-execute">
+	<button class="btn btn-success t3js-installer-environmentFolders-execute">
 		System looks good. Continue!
 	</button>
 </form>